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Old 03-13-2008, 11:30 PM   #1
Hayaboosted
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Member#: 60042
Join Date: Apr 2004
Chapter/Region: MWSOC
Location: Janesville, Wisconsin
Vehicle:
2004 WRX STI
Rotated T67 ALLABOUTSPEED

Default NGK Copper 1 Step Colder Spark Plug Number Needed

As the title states im looking for the 1 step colder spark plug part number from NGK for the STI's. I searched and searched and only found unhelpful information. I want COPPER.... Not Iridium. I have the number for iridiums which i found in several threads but thats not what I need.
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Old 03-14-2008, 02:04 AM   #2
a6n6d6y
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Member#: 123347
Join Date: Aug 2006
Chapter/Region: NWIC
Location: SEATTLE
Vehicle:
1993 POS
burgandy legacy

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LFR6A-11 is the standard heat range so it looks like LFR7A-11

http://www.ngksparkplugs.com/techinf...tnumberkey.pdf

Last edited by a6n6d6y; 03-14-2008 at 02:13 AM.
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Old 03-15-2008, 10:50 AM   #3
Geeoff
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Join Date: Jan 2006
Chapter/Region: NESIC
Location: Manchester, NH
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06 WRX TR
'05 Matrix XRS

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I can't find any place that sells these as an option. Anybody know where to find them? Are they even made?
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Old 03-15-2008, 01:38 PM   #4
Arctic Penguin
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Join Date: Jul 2006
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2006 WRX

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afaik

there is no propper copper plug for the 2.5T head
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Old 03-15-2008, 03:03 PM   #5
jays05
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Join Date: Dec 2004
Chapter/Region: South East
Location: SC
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05 STI 35r + e85

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Yup, there is no 1-step colder copper plug for the STI. But the standard heat range copper plug seems to work good in high hp applications.
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